Hey
I'm putting the final touches on a MIDI controller and I have added provisions for powering another Teensy and having it communicate via UART.
Currently I've just got 4 pins
- 5v out from VIN to provide Power to another t4.0 via its vin pin
- GND
- RX
- TX
Question 1 - Should I have protection or isolation from the VIN pin?
Question 2 - should RX and TX be optoisolated to prevent against reversed polarity or over voltage coming back to damage the UART RX and TX? (6N138 maybe)
Thanks
I'm putting the final touches on a MIDI controller and I have added provisions for powering another Teensy and having it communicate via UART.
Currently I've just got 4 pins
- 5v out from VIN to provide Power to another t4.0 via its vin pin
- GND
- RX
- TX
Question 1 - Should I have protection or isolation from the VIN pin?
Question 2 - should RX and TX be optoisolated to prevent against reversed polarity or over voltage coming back to damage the UART RX and TX? (6N138 maybe)
Thanks